Your quality guarantee

Strengthen your business with products made from genuine high-strength steel with measured, guaranteed properties.

At SSAB, we work relentlessly to improve production processes. As a result, we can guarantee both closer tolerances and improved workshop properties, and help our customers develop new and better products. In fact, SSAB was first in the world to introduce a precision guarantee on the thickness of our high-strength steel plates – Strenx® guarantees.

The benefits of precision in steel gauge thickness

SSAB’s Strenx® guarantees include tight thickness tolerances, tight flatness tolerances and bending guarantees. The tight thickness tolerances enable you to know the weight more precisely. As a result, you can reduce your safety margins. Precise thickness within a plate and between plates makes for safe and predictable performance in the workshop.

Laser cutting and automated welding benefit from the narrow tolerances for optimized cutting speed. When bending, you can use the same force and get the same spring-back from plate to plate.You can find the relevant tolerance class for each steel grade below.

Flatness tolerance chart

Flatness tolerance

SSAB has four classes of flatness tolerances which depend on the type of product and material strength. All classes conform to or are closer than EN 10 029. Classes A and B also conform to, or are closer than EN 10 051.

Class

Nominal thickness (mm)

Flatness (mm/1m ruler)

Steel Flatness

A

1.5 - 2.9

3

3.0 - 4.9

3

5.0 - 7.9

3

8.0 - 14.9

3

15.0 - 24.9

3

B

1.5 - 2.9

6

3.0 - 4.9

6

5.0 - 7.9

6

8.0 - 14.9

6

15.0 - 29.9

6

C

4.0 - 4.9

5

5.0 - 7.9

4

8.0 - 39.9

3

40.0 - 160.0

3

D

4.0 - 4.9

7

5.0 - 5.9

5

6.0 - 19.9

4

20.0 - 40.0

3

Flatness is measured according to standard EN 10 029 for classes C and D and EN 10 051 for classes A and B. Information on wihich class applies to each grade is provided in the respective data sheet.

Bending tolerance chart

Bending guarantee

SSAB has four bending guarantee classes for plate according to the chart below. Information on which class applies to each grade is provided in the respective data sheet. All classes conform to or are closer than the requirements in EN 10 025-6. The bending guarantees also conform to EN ISO 7438.

Strenx MC steels have a guaranteed minimum bending radius, valid for both longitudinal and transversal directions, that is closer than standard EN 10 149. Check the data sheet for guaranteed values.

Strenx CR steels have a guaranteed minimum bending radius, valid for both longitudinal and transversal directions. Check the data sheet for guaranteed values.

Class

Nominal thickness

Punch radius minimum R/t (1)

Bending direction (2)

┴ ║

A

t < 8

1.5

2.0

8 ≤ t < 15

1.5

2.0

15 ≤ t < 20

2.0

2.5

t ≤ 20

2.0

2.5

B

t < 8

2.5

3.0

8 ≤ t < 15

2.5

3.0

15 ≤ t < 20

2.5

3.0

t ≤20

3.0

3.5

C

t < 8

3.0

3.5

8 ≤ t < 15

3.0

3.5

15 ≤ t < 20

3.0

3.5

t ≤20

3.5

4.0

D

t < 8

3.5

4.0

8 ≤ t < 15

4.0

4.5

1) R/t stands for punch radius (R) divided by sheet thickness (t). The guaranteed values are valid under conditions given in the brochure Bending of High Strength Steel.2) The plate rolling direction.

My Inner Strenx®: A stamp of quality for applications using Strenx® steel

My Inner Strenx® is a members-only program that allows approved manufacturers to place the My Inner Strenx® trademark sign on their products. A powerful marketing tool for OEMs, it’s also a way for end users to identify producers and products made with superior steel and quality-controlled production techniques for demanding applications.

Find out more about the My Inner Strenx® program or contact your local sales rep to join today.